package com.polymer.app.utils;

import java.util.Random;

public class RandomStrCreator {
    private final static String [] tmp= {"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a",
            "b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3",
            "4","5","6","7","8","9"};
    
    public static void main(String[] args) {
            //Thread t2 = new Thread(() -> System.out.println("use lambda"));
            //HashMap<String, String> map=new HashMap<String, String>();
           String str = createRandomStr(128); 
           System.out.println(str);
            
    }

    public static String createRandomStr(int i) {
        StringBuilder sb=new StringBuilder();
        Random random=new Random();
        for (int j = 0; j < i; j++) {
            sb.append(tmp[random.nextInt(tmp.length)]);
        }
        return sb.toString();
    }
}
